16178-66-8 3,7-Diaminophenazathionium chloride 3,7-Diaminophenothiazin-5-ium chloride 50815-03-7 581-64-6 C.I. 52000 CCRIS 5616 Cyanine EINECS 209-470-3 Katalysin Lauth's Violet Lauthsches violett [German] NSC 56342 NSC 9591 Phenothiazin-5-ium, 3,7-diamino-, chloride Thionin Thionine Thionine (VAN)